Commit 6d8fc4d2 authored by Alan Stern's avatar Alan Stern Committed by Greg Kroah-Hartman

USB HID: Handle STALL on interrupt endpoint

The USB HID driver doesn't include any code to handle a STALL on the
interrupt endpoint.  While this may be uncommon, it does happen
sometimes.  This patch (as805) adds a fix.
Signed-off-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 88fafff9
......@@ -968,20 +968,29 @@ static void hid_retry_timeout(unsigned long _hid)
hid_io_error(hid);
}
/* Workqueue routine to reset the device */
/* Workqueue routine to reset the device or clear a halt */
static void hid_reset(void *_hid)
{
struct hid_device *hid = (struct hid_device *) _hid;
int rc_lock, rc;
dev_dbg(&hid->intf->dev, "resetting device\n");
rc = rc_lock = usb_lock_device_for_reset(hid->dev, hid->intf);
if (rc_lock >= 0) {
rc = usb_reset_composite_device(hid->dev, hid->intf);
if (rc_lock)
usb_unlock_device(hid->dev);
int rc_lock, rc = 0;
if (test_bit(HID_CLEAR_HALT, &hid->iofl)) {
dev_dbg(&hid->intf->dev, "clear halt\n");
rc = usb_clear_halt(hid->dev, hid->urbin->pipe);
clear_bit(HID_CLEAR_HALT, &hid->iofl);
hid_start_in(hid);
}
else if (test_bit(HID_RESET_PENDING, &hid->iofl)) {
dev_dbg(&hid->intf->dev, "resetting device\n");
rc = rc_lock = usb_lock_device_for_reset(hid->dev, hid->intf);
if (rc_lock >= 0) {
rc = usb_reset_composite_device(hid->dev, hid->intf);
if (rc_lock)
usb_unlock_device(hid->dev);
}
clear_bit(HID_RESET_PENDING, &hid->iofl);
}
clear_bit(HID_RESET_PENDING, &hid->iofl);
switch (rc) {
case 0:
......@@ -1023,9 +1032,8 @@ static void hid_io_error(struct hid_device *hid)
/* Retries failed, so do a port reset */
if (!test_and_set_bit(HID_RESET_PENDING, &hid->iofl)) {
if (schedule_work(&hid->reset_work))
goto done;
clear_bit(HID_RESET_PENDING, &hid->iofl);
schedule_work(&hid->reset_work);
goto done;
}
}
......@@ -1049,6 +1057,11 @@ static void hid_irq_in(struct urb *urb)
hid->retry_delay = 0;
hid_input_report(HID_INPUT_REPORT, urb, 1);
break;
case -EPIPE: /* stall */
clear_bit(HID_IN_RUNNING, &hid->iofl);
set_bit(HID_CLEAR_HALT, &hid->iofl);
schedule_work(&hid->reset_work);
return;
case -ECONNRESET: /* unlink */
case -ENOENT:
case -ESHUTDOWN: /* unplug */
......
......@@ -385,6 +385,7 @@ struct hid_control_fifo {
#define HID_IN_RUNNING 3
#define HID_RESET_PENDING 4
#define HID_SUSPENDED 5
#define HID_CLEAR_HALT 6
struct hid_input {
struct list_head list;
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment